Fix missing CapacityReservationId and CapacityReservationStatus columns in Power BI storage templates

[Copilot]

Problem

Users reported errors when refreshing Power BI reports in Power BI Service with the following message:

Data source error: The 'CapacityReservationId' column does not exist in the rowset.

While the dataset refreshed successfully in Power BI Desktop, it failed in Power BI Service due to missing FOCUS 1.2 specification columns.

Root Cause

The Power BI storage templates were missing two required FOCUS 1.2 columns:

• CapacityReservationId - Identifier assigned to VM capacity reservations
• CapacityReservationStatus - Status indicating whether the capacity reservation is "Used" or "Unused"

According to the FOCUS 1.2 specification, these columns must be present when the provider supports capacity reservations. The KQL-based templates already had these columns, but the storage-based templates were missing them.

Solution

Added both columns to the storage-based Power BI templates:

1. ftk_NormalizeSchema.pq: Added column transformations following FOCUS conversion rules

   • CapacityReservationId: Maps from x_CapacityCommitmentId (extracted from AdditionalInfo.VMCapacityReservationId)
   • CapacityReservationStatus: Returns null when no ID exists, "Unused" for capacity reservation resources, otherwise "Used"

2. Costs.tmdl: Added column definitions to the Costs table schema for storage-based datasets

The implementation follows the FOCUS conversion guide for mapping Cost Management data to FOCUS format.

Testing

• ✅ Verified KQL templates already have these columns (no changes needed)
• ✅ Validated Power Query (M) and TMDL syntax
• ✅ Confirmed mapping logic aligns with FOCUS 1.2 specification

Fixes #1839

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  • Triggering command: pwsh -Command ./src/scripts/Build-PowerBI.ps1 CostSummary -Storage (dns block)

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Original prompt

---

This section details on the original issue you should resolve

<issue_title>CapacityReservationId column does not exist in the rowset</issue_title> <issue_description>We are currently utilizing the Cost Summary prebuilt Power BI template available from the FinOps Toolkit (https://microsoft.github.io/finops-toolkit/power-bi).

While the dataset refreshes successfully in Power BI Desktop, we encounter the following error when attempting to refresh it in the Power BI Service:

Data source error: The 'CapacityReservationId' column does not exist in the rowset.

We kindly request your support in resolving this issue and addressing the inconsistency observed.

</issue_description>

<agent_instructions>Triage the issue, research using mslearn, provide proposed solutions along with links/citations to authorative sources.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

Fixes microsoft/finops-toolkit#1836

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[iamfirdousfifa]

Hello Team @MSBrett could you please share tentative ETA on the fix